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Dynamic risk measure

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is a risk measure that deals with the question of how evaluations of risk at different times are related. It can be interpreted as a sequence of conditional risk measures.
608: 1475: 1219: 1403: 1427: 1059: 942: 98: 348: 783:{\displaystyle \forall \lambda \in L_{t}^{\infty },0\leq \lambda \leq 1:\rho _{t}(\lambda X+(1-\lambda )Y)\leq \lambda \rho _{t}(X)+(1-\lambda )\rho _{t}(Y)} 473: 1670: 1067: 950: 1808: 271:{\displaystyle \rho _{t}:L^{\infty }\left({\mathcal {F}}_{T}\right)\rightarrow L_{t}^{\infty }=L^{\infty }\left({\mathcal {F}}_{t}\right)} 281: 111: 1648:{\displaystyle \rho _{t+1}(X)\leq \rho _{t+1}(Y)\Rightarrow \rho _{t}(X)\leq \rho _{t}(Y)\;\forall X,Y\in L^{0}({\mathcal {F}}_{T})} 1983: 17: 1853: 1303: 2069: 1266: 899:{\displaystyle \forall \lambda \in L_{t}^{\infty },\lambda \geq 0:\rho _{t}(\lambda X)=\lambda \rho _{t}(X)} 1228: 1937:
Föllmer, Hans; Penner, Irina (2006). "Convex risk measures and the dynamics of their penalty functions".
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Cheridito, Patrick; Stadje, Mitja (2009). "Time-inconsistency of VaR and time-consistent alternatives".
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this would be akin to calculating the risk on the subtree branching off from the point in question.
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The financial interpretation of this states that the conditional risk at some future node (i.e.
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is a conditional risk measure if it has the following properties for random portfolio returns
2009: 794: 28: 1381: 8: 614: 74: 1990: 457:{\displaystyle \forall m_{t}\in L_{t}^{\infty }:\;\rho _{t}(X+m_{t})=\rho _{t}(X)-m_{t}} 1964: 1919: 1863: 1664: 1412: 1406: 1044: 927: 83: 555:{\displaystyle \mathrm {If} \;X\leq Y\;\mathrm {then} \;\rho _{t}(X)\geq \rho _{t}(Y)} 1849: 1783:{\displaystyle \rho _{t}(-X)=\operatorname {*} {ess\sup }_{Q\in EMM}\mathbb {E} ^{Q}} 1183: 1968: 1923: 1892:
Detlefsen, K.; Scandolo, G. (2005). "Conditional and dynamic convex risk measures".
2045: 1956: 1911: 1490: 101: 36: 1478: 1147:{\displaystyle \rho _{t}={\text{ess}}\inf\{Y\in L_{t}^{\infty }:X+Y\in A_{t}\}} 1030:{\displaystyle A_{t}=\{X\in L_{T}^{\infty }:\rho _{t}(X)\leq 0{\text{ a.s.}}\}} 921: 915: 77: 40: 2049: 1984:"Dynamic convex risk measures: time consistency, prudence, and sustainability" 1960: 1915: 65:
A different approach to dynamic risk measurement has been suggested by Novak.
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is a conditional convex risk measure that additionally satisfies:
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can be thought of as a conditional risk measure on the trivial
1429:. Any normalized conditional convex risk measure is regular. 1790:. It is shown that this is a time consistent risk measure. 1477:) only depends on the possible states from that node. In a 1495:
A dynamic risk measure is time consistent if and only if
1658: 1673: 1501: 1438: 1415: 1384: 1306: 1269: 1231: 1200: 1163: 1070: 1047: 953: 930: 809: 629: 574: 476: 351: 284: 169: 114: 86: 1371:{\displaystyle \rho _{t}(1_{A}X)=1_{A}\rho _{t}(X)} 1061:then the corresponding conditional risk measure is 1782: 1647: 1469: 1421: 1397: 1370: 1292: 1255: 1213: 1174: 1146: 1053: 1029: 936: 898: 782: 602: 554: 456: 331: 270: 155: 92: 1891: 47:) as if measured at some point in the future. A 2061: 1718: 1667:involves conditional risk measures of the form 1169: 1089: 2035: 944:associated with a conditional risk measure is 163:denotes the payoff of a portfolio. A mapping 1936: 1806: 1141: 1092: 1024: 967: 1484: 1041:If you are given an acceptance set at time 68: 1599: 510: 495: 485: 386: 1950: 1905: 1816:Advanced Mathematical Methods for Finance 1807:Acciaio, Beatrice; Penner, Irina (2011). 1742: 1293:{\displaystyle A\in {\mathcal {F}}_{t}} 14: 2062: 1981: 1887: 1885: 1843: 617:then it will also have the property: 1256:{\displaystyle X\in L_{T}^{\infty }} 1882: 1659:Example: dynamic superhedging price 1189: 24: 1766: 1631: 1600: 1279: 1248: 1111: 986: 829: 810: 649: 630: 506: 503: 500: 497: 481: 478: 378: 352: 314: 302: 253: 241: 228: 200: 188: 138: 126: 25: 2081: 1175:{\displaystyle {\text{ess}}\inf } 909: 801:Conditional positive homogeneity 2029: 1975: 1930: 1837: 1800: 1777: 1759: 1752: 1693: 1684: 1642: 1625: 1596: 1590: 1574: 1568: 1555: 1552: 1546: 1524: 1518: 1464: 1458: 1455: 1449: 1365: 1359: 1333: 1317: 1010: 1004: 893: 887: 868: 859: 777: 771: 758: 746: 740: 734: 715: 709: 697: 685: 603:{\displaystyle \rho _{t}(0)=0} 591: 585: 549: 543: 527: 521: 438: 432: 416: 397: 215: 13: 1: 1846:On measures of financial risk 1793: 1470:{\displaystyle \rho _{t}(X)} 7: 1194:A conditional risk measure 343:Conditional cash invariance 10: 2086: 1939:Statistics & Decisions 1488: 913: 2050:10.1016/j.frl.2008.10.002 1961:10.1524/stnd.2006.24.1.61 1916:10.1007/s00780-005-0159-6 1214:{\displaystyle \rho _{t}} 2038:Finance Research Letters 1485:Time consistent property 69:Conditional risk measure 33:conditional risk measure 18:Conditional risk measure 2070:Financial risk modeling 1894:Finance and Stochastics 1809:"Dynamic risk measures" 613:If it is a conditional 2017:Cite journal requires 1982:Penner, Irina (2007). 1818:: 1–34. Archived from 1784: 1649: 1471: 1423: 1399: 1372: 1294: 1257: 1215: 1176: 1148: 1055: 1031: 938: 900: 784: 604: 556: 458: 333: 272: 157: 94: 80:at some terminal time 1785: 1650: 1472: 1424: 1400: 1398:{\displaystyle 1_{A}} 1373: 1295: 1258: 1216: 1177: 1149: 1056: 1032: 939: 901: 795:coherent risk measure 785: 621:Conditional convexity 605: 557: 459: 334: 273: 158: 95: 29:financial mathematics 1848:. pp. 541–549. 1844:Novak, S.Y. (2015). 1825:on September 2, 2011 1671: 1499: 1436: 1413: 1382: 1304: 1267: 1229: 1198: 1161: 1068: 1045: 951: 928: 807: 627: 572: 474: 349: 282: 167: 112: 84: 60:dynamic risk measure 1252: 1115: 990: 833: 653: 615:convex risk measure 382: 232: 1780: 1665:superhedging price 1645: 1467: 1419: 1407:indicator function 1395: 1368: 1290: 1253: 1238: 1211: 1172: 1144: 1101: 1051: 1027: 976: 934: 896: 819: 780: 639: 600: 552: 454: 368: 329: 268: 218: 153: 90: 43:(particularly the 1702: 1422:{\displaystyle A} 1184:essential infimum 1167: 1087: 1054:{\displaystyle t} 1022: 937:{\displaystyle t} 106:uniformly bounded 93:{\displaystyle T} 16:(Redirected from 2077: 2054: 2053: 2033: 2027: 2026: 2020: 2015: 2013: 2005: 2003: 2001: 1996:on July 19, 2011 1995: 1989:. Archived from 1988: 1979: 1973: 1972: 1954: 1934: 1928: 1927: 1909: 1889: 1880: 1879: 1873: 1869: 1867: 1859: 1841: 1835: 1834: 1832: 1830: 1824: 1813: 1804: 1789: 1787: 1786: 1781: 1776: 1775: 1770: 1769: 1762: 1751: 1750: 1745: 1739: 1738: 1721: 1703: 1700: 1683: 1682: 1654: 1652: 1651: 1646: 1641: 1640: 1635: 1634: 1624: 1623: 1589: 1588: 1567: 1566: 1545: 1544: 1517: 1516: 1491:Time consistency 1476: 1474: 1473: 1468: 1448: 1447: 1428: 1426: 1425: 1420: 1404: 1402: 1401: 1396: 1394: 1393: 1377: 1375: 1374: 1369: 1358: 1357: 1348: 1347: 1329: 1328: 1316: 1315: 1299: 1297: 1296: 1291: 1289: 1288: 1283: 1282: 1262: 1260: 1259: 1254: 1251: 1246: 1220: 1218: 1217: 1212: 1210: 1209: 1190:Regular property 1181: 1179: 1178: 1173: 1168: 1165: 1153: 1151: 1150: 1145: 1140: 1139: 1114: 1109: 1088: 1085: 1080: 1079: 1060: 1058: 1057: 1052: 1036: 1034: 1033: 1028: 1023: 1020: 1003: 1002: 989: 984: 963: 962: 943: 941: 940: 935: 905: 903: 902: 897: 886: 885: 858: 857: 832: 827: 789: 787: 786: 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1929: 1900:(4): 539–561. 1881: 1872:|journal= 1854: 1836: 1798: 1797: 1795: 1792: 1779: 1774: 1768: 1761: 1757: 1754: 1749: 1744: 1737: 1734: 1731: 1728: 1725: 1720: 1717: 1714: 1711: 1706: 1698: 1695: 1692: 1689: 1686: 1681: 1677: 1660: 1657: 1644: 1639: 1633: 1627: 1622: 1618: 1614: 1611: 1608: 1605: 1602: 1598: 1595: 1592: 1587: 1583: 1579: 1576: 1573: 1570: 1565: 1561: 1557: 1554: 1551: 1548: 1543: 1540: 1537: 1533: 1529: 1526: 1523: 1520: 1515: 1512: 1509: 1505: 1489:Main article: 1486: 1483: 1479:binomial model 1466: 1463: 1460: 1457: 1454: 1451: 1446: 1442: 1418: 1392: 1388: 1367: 1364: 1361: 1356: 1352: 1346: 1342: 1338: 1335: 1332: 1327: 1323: 1319: 1314: 1310: 1287: 1281: 1275: 1272: 1250: 1245: 1241: 1237: 1234: 1221:is said to be 1208: 1204: 1191: 1188: 1171: 1155: 1154: 1143: 1138: 1134: 1130: 1127: 1124: 1121: 1118: 1113: 1108: 1104: 1100: 1097: 1094: 1091: 1083: 1078: 1074: 1050: 1039: 1038: 1026: 1018: 1015: 1012: 1009: 1006: 1001: 997: 993: 988: 983: 979: 975: 972: 969: 966: 961: 957: 933: 922:acceptance set 916:Acceptance set 914:Main article: 911: 910:Acceptance set 908: 907: 906: 895: 892: 889: 884: 880: 876: 873: 870: 867: 864: 861: 856: 852: 848: 845: 842: 839: 836: 831: 826: 822: 818: 815: 812: 802: 793:A conditional 791: 790: 779: 776: 773: 768: 764: 760: 757: 754: 751: 748: 745: 742: 739: 736: 731: 727: 723: 720: 717: 714: 711: 708: 705: 702: 699: 696: 693: 690: 687: 682: 678: 674: 671: 668: 665: 662: 659: 656: 651: 646: 642: 638: 635: 632: 622: 611: 610: 599: 596: 593: 590: 587: 582: 578: 567: 563: 562: 551: 548: 545: 540: 536: 532: 529: 526: 523: 518: 514: 508: 505: 502: 499: 494: 491: 488: 483: 480: 469: 465: 464: 451: 447: 443: 440: 437: 434: 429: 425: 421: 418: 413: 409: 405: 402: 399: 394: 390: 385: 380: 375: 371: 367: 362: 358: 354: 344: 327: 322: 316: 310: 304: 300: 296: 293: 290: 287: 266: 261: 255: 249: 243: 239: 235: 230: 225: 221: 217: 213: 208: 202: 196: 190: 186: 182: 177: 173: 151: 146: 140: 134: 128: 124: 120: 117: 89: 70: 67: 41:financial risk 9: 6: 4: 3: 2: 2082: 2071: 2068: 2067: 2065: 2051: 2047: 2043: 2039: 2032: 2024: 2011: 1992: 1985: 1978: 1970: 1966: 1962: 1958: 1953: 1948: 1944: 1940: 1933: 1925: 1921: 1917: 1913: 1908: 1903: 1899: 1895: 1888: 1886: 1877: 1865: 1857: 1851: 1847: 1840: 1821: 1817: 1810: 1803: 1799: 1791: 1772: 1755: 1747: 1735: 1732: 1729: 1726: 1723: 1715: 1712: 1709: 1704: 1696: 1690: 1687: 1679: 1675: 1666: 1656: 1637: 1620: 1616: 1612: 1609: 1606: 1603: 1593: 1585: 1581: 1577: 1571: 1563: 1559: 1549: 1541: 1538: 1535: 1531: 1527: 1521: 1513: 1510: 1507: 1503: 1492: 1482: 1480: 1461: 1452: 1444: 1440: 1430: 1416: 1408: 1390: 1386: 1362: 1354: 1350: 1344: 1340: 1336: 1330: 1325: 1321: 1312: 1308: 1285: 1273: 1270: 1243: 1239: 1235: 1232: 1224: 1206: 1202: 1187: 1185: 1136: 1132: 1128: 1125: 1122: 1119: 1116: 1106: 1102: 1098: 1095: 1081: 1076: 1072: 1064: 1063: 1062: 1048: 1016: 1013: 1007: 999: 995: 991: 981: 977: 973: 970: 964: 959: 955: 947: 946: 945: 931: 923: 917: 890: 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Retrieved 1991:the original 1977: 1945:(1): 61–96. 1942: 1938: 1932: 1897: 1893: 1845: 1839: 1827:. Retrieved 1820:the original 1815: 1802: 1663:The dynamic 1662: 1494: 1431: 1222: 1193: 1156: 1040: 919: 792: 612: 468:Monotonicity 72: 64: 59: 57: 49:risk measure 32: 26: 2000:February 3, 1225:if for any 75:portfolio's 73:Consider a 1794:References 1021: a.s. 1947:CiteSeerX 1902:CiteSeerX 1874:ignored ( 1864:cite book 1727:∈ 1705:⁡ 1688:− 1676:ρ 1613:∈ 1601:∀ 1582:ρ 1578:≤ 1560:ρ 1556:⇒ 1532:ρ 1528:≤ 1504:ρ 1462:ω 1441:ρ 1351:ρ 1309:ρ 1274:∈ 1249:∞ 1236:∈ 1203:ρ 1129:∈ 1112:∞ 1099:∈ 1073:ρ 1014:≤ 996:ρ 987:∞ 974:∈ 879:ρ 875:λ 863:λ 851:ρ 841:≥ 838:λ 830:∞ 817:∈ 814:λ 811:∀ 763:ρ 756:λ 753:− 726:ρ 722:λ 719:≤ 707:λ 704:− 689:λ 677:ρ 667:≤ 664:λ 661:≤ 650:∞ 637:∈ 634:λ 631:∀ 577:ρ 535:ρ 531:≥ 513:ρ 490:≤ 442:− 424:ρ 389:ρ 379:∞ 366:∈ 353:∀ 303:∞ 295:∈ 242:∞ 229:∞ 216:→ 189:∞ 172:ρ 127:∞ 119:∈ 2064:Category 1969:54734936 1924:10579202 1829:July 22, 924:at time 108:, i.e., 104:that is 1405:is the 1223:regular 1182:is the 78:returns 39:of the 1967:  1949:  1922:  1904:  1852:  1378:where 1157:where 1994:(PDF) 1987:(PDF) 1965:S2CID 1920:S2CID 1823:(PDF) 1812:(PDF) 1300:then 100:as a 35:is a 2023:help 2002:2011 1876:help 1850:ISBN 1831:2010 1263:and 920:The 55:. 31:, a 2046:doi 1957:doi 1912:doi 1719:sup 1409:on 1170:inf 1166:ess 1090:inf 1086:ess 27:In 2066:: 2040:. 2014:: 2012:}} 2008:{{ 1963:. 1955:. 1943:24 1941:. 1918:. 1910:. 1896:. 1884:^ 1868:: 1866:}} 1862:{{ 1814:. 1655:. 1186:. 339:: 58:A 2052:. 2048:: 2042:6 2025:) 2021:( 2004:. 1971:. 1959:: 1926:. 1914:: 1898:9 1878:) 1858:. 1833:. 1778:] 1773:t 1767:F 1760:| 1756:X 1753:[ 1748:Q 1743:E 1736:M 1733:M 1730:E 1724:Q 1716:s 1713:s 1710:e 1701:* 1697:= 1694:) 1691:X 1685:( 1680:t 1643:) 1638:T 1632:F 1626:( 1621:0 1617:L 1610:Y 1607:, 1604:X 1597:) 1594:Y 1591:( 1586:t 1575:) 1572:X 1569:( 1564:t 1553:) 1550:Y 1547:( 1542:1 1539:+ 1536:t 1525:) 1522:X 1519:( 1514:1 1511:+ 1508:t 1465:] 1459:[ 1456:) 1453:X 1450:( 1445:t 1417:A 1391:A 1387:1 1366:) 1363:X 1360:( 1355:t 1345:A 1341:1 1337:= 1334:) 1331:X 1326:A 1322:1 1318:( 1313:t 1286:t 1280:F 1271:A 1244:T 1240:L 1233:X 1207:t 1142:} 1137:t 1133:A 1126:Y 1123:+ 1120:X 1117:: 1107:t 1103:L 1096:Y 1093:{ 1082:= 1077:t 1049:t 1037:. 1025:} 1017:0 1011:) 1008:X 1005:( 1000:t 992:: 982:T 978:L 971:X 968:{ 965:= 960:t 956:A 932:t 894:) 891:X 888:( 883:t 872:= 869:) 866:X 860:( 855:t 847:: 844:0 835:, 825:t 821:L 778:) 775:Y 772:( 767:t 759:) 750:1 747:( 744:+ 741:) 738:X 735:( 730:t 716:) 713:Y 710:) 701:1 698:( 695:+ 692:X 686:( 681:t 673:: 670:1 658:0 655:, 645:t 641:L 598:0 595:= 592:) 589:0 586:( 581:t 550:) 547:Y 544:( 539:t 528:) 525:X 522:( 517:t 507:n 504:e 501:h 498:t 493:Y 487:X 482:f 479:I 450:t 446:m 439:) 436:X 433:( 428:t 420:= 417:) 412:t 408:m 404:+ 401:X 398:( 393:t 384:: 374:t 370:L 361:t 357:m 326:) 321:T 315:F 309:( 299:L 292:Y 289:, 286:X 265:) 260:t 254:F 248:( 238:L 234:= 224:t 220:L 212:) 207:T 201:F 195:( 185:L 181:: 176:t 150:) 145:T 139:F 133:( 123:L 116:X 88:T 20:)

Index

Conditional risk measure
financial mathematics
random variable
financial risk
downside risk
risk measure
sigma algebra
portfolio's
returns
random variable
uniformly bounded
convex risk measure
coherent risk measure
Acceptance set
acceptance set
essential infimum
indicator function
binomial model
Time consistency
superhedging price
"Dynamic risk measures"
the original
ISBN
978-849844-4964
cite book
help


CiteSeerX
10.1.1.453.4944

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